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The reformer product gas leaves the reformer at 855C. (a)
Chapter 13, Problem 13.7(choose chapter or problem)
The reformer product gas leaves the reformer at 855C. (a) Using the flow rate of the product gas determined in 13.5, calculate the rate (kJ/h) at which heat must be transferred from the combustion gases to the gases flowing through the inside of the reformer tubes. (b) What is the required flow rate of natural gas (kmol/h and SCMM) to the reformer burners? Assume that the natural gas is burned to completion in the reformer firebox and that the combustion gases leave the firebox at 960C. (c) The thermal efficiency of the firebox may be defined as the percentage of the lower heating value of the fuel transferred to the reformer gases. Estimate the lower heating value of methane and, assuming the combustion gases leave the firebox at 960C, the corresponding thermal efficiency of the firebox.
Questions & Answers
QUESTION:
The reformer product gas leaves the reformer at 855C. (a) Using the flow rate of the product gas determined in 13.5, calculate the rate (kJ/h) at which heat must be transferred from the combustion gases to the gases flowing through the inside of the reformer tubes. (b) What is the required flow rate of natural gas (kmol/h and SCMM) to the reformer burners? Assume that the natural gas is burned to completion in the reformer firebox and that the combustion gases leave the firebox at 960C. (c) The thermal efficiency of the firebox may be defined as the percentage of the lower heating value of the fuel transferred to the reformer gases. Estimate the lower heating value of methane and, assuming the combustion gases leave the firebox at 960C, the corresponding thermal efficiency of the firebox.
ANSWER:Step 1 of 6
13.7.a.
The
The heat transferred from the combustion gases to the gases flowing inside the reformer is as follows:
